(19)
(11) EP 1 168 661 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.11.2003 Bulletin 2003/46

(43) Date of publication A2:
02.01.2002 Bulletin 2002/01

(21) Application number: 01112841.0

(22) Date of filing: 30.05.2001
(51) International Patent Classification (IPC)7: H04B 7/185
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 19.06.2000 US 596344

(71) Applicant: TRW Inc.
Redondo Beach, California 90278 (US)

(72) Inventors:
  • Nivens, Dennis A.
    Hermosa Beach, CA 90254 (US)
  • Wright, David
    Hermosa Beach, CA 90254 (US)
  • Munoz Michael S.
    Redondo Beach, CA 90278 (US)
  • Caso, Gregory S.
    Hermosa Beach, CA 90254 (US)
  • Stephens, Scott.A
    Phoenix,AZ 85048 (US)

(74) Representative: Schmidt, Steffen J., Dipl.-Ing. 
Wuesthoff & Wuesthoff, Patent- und Rechtsanwälte, Schweigerstrasse 2
81541 München
81541 München (DE)

   


(54) Method and system for controlling uplink power in a satellite communication system using error levelling


(57) A method and system for controlling uplink power in a satellite communication system using error leveling is provided. The uplink power control system for a satellite communication system of a preferred embodiment of the present invention comprises a communication satellite (101) and at least one UET(105). The communication satellite (101) includes an error detector (211) and a comparator (215). The UET (105) includes a receiver (206) for receiving an error indicator signal from the comparator (215), and a power profile processor (216) for controlling the transmit power level of the particular chanslot being used by the UET in response to the error indicator. A preferred method for controlling the transmit power level of a particular chanslot assigned to a UET in a satellite communication system in accordance with the present invention includes determining an error count for an uplink data signal received from the UET in the chanslot (403), and comparing the error count to a predetermined error threshold (404). The method further includes generating an error indicator signal for the chanslot in response to the comparison (405), and controlling the transmit power level of the particular chanslot in response to the error indicator (409, 410).






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